Sibling layout change doesn't trigger other siblings onLayout.

[cheng-kang]

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• Search for existing issues: https://github.com/facebook/react-native/issues
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Environment

  React Native Environment Info:
    System:
      OS: macOS High Sierra 10.13.6
      CPU: x64 Intel(R) Core(TM) i5-7360U CPU @ 2.30GHz
      Memory: 182.39 MB / 8.00 GB
      Shell: 3.2.57 - /bin/bash
    Binaries:
      Node: 10.4.0 - /usr/local/bin/node
      Yarn: 1.5.1 - /usr/local/bin/yarn
      npm: 6.1.0 - /usr/local/bin/npm
      Watchman: 4.9.0 - /usr/local/bin/watchman
    SDKs:
      iOS SDK:
        Platforms: iOS 11.3, macOS 10.13, tvOS 11.3, watchOS 4.3
    IDEs:
      Android Studio: 3.1 AI-173.4670197
      Xcode: 9.3/9Q117m - /usr/bin/xcodebuild
    npmPackages:
      @storybook/react: ^3.4.5 => 3.4.8
      react: ^16.3.2 => 16.4.1
      react-native: ^0.56.0 => 0.56.0
    npmGlobalPackages:
      create-react-native-app: 1.0.0
      react-native-cli: 2.0.1

Description

Sibling layout change doesn't trigger other siblings onLayout.

Reproducible Demo

https://codesandbox.io/s/k2r38p70jr

This is a react-native-web example. But I've tested it with react-native on iOS simulator, it has the same behaviour.

[cheng-kang]

onLayout shouldn't bother this case.